Jan Kara <[email protected]> wrote:
>
> attached patch adds an operation SWRITE to ll_rw_block(). When this
> operation is specified ll_rw_block() waits for a buffer lock and doesn't
> just skip the locked buffer. Under some circumstances we need to make
> sure that current data are really being sent to disk and the old
> ll_rw_block()'s behaviour makes this impossible to achieve (as in some
> places we lock and unlock buffer without sending it to disk).
Fair enough - it's certainly saner this way.
Ordinarily it would be nicer to add a new function for this, say
ll_sync_write_bufs(struct buffer_head **bufs, int nr)
rather than adding new interpretations to ll_rw_block().
But ll_rw_block() is such a familiar old thing that I guess there's not
much advantage in adding some new thing for people to remember.
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